Merge bitcoin/bitcoin#22834: net: respect -onlynet= when making outbound connections

0eea83a85e scripted-diff: rename `proxyType` to `Proxy` (Vasil Dimov)
e53a8505db net: respect -onlynet= when making outbound connections (Vasil Dimov)

Pull request description:

  Do not make outbound connections to hosts which belong to a network
  which is restricted by `-onlynet`.

  This applies to hosts that are automatically chosen to connect to and to
  anchors.

  This does not apply to hosts given to `-connect`, `-addnode`,
  `addnode` RPC, dns seeds, `-seednode`.

  Fixes https://github.com/bitcoin/bitcoin/issues/13378
  Fixes https://github.com/bitcoin/bitcoin/issues/22647
  Supersedes https://github.com/bitcoin/bitcoin/pull/22651

ACKs for top commit:
  naumenkogs:
    utACK 0eea83a85e
  prayank23:
    reACK 0eea83a85e
  jonatack:
    ACK 0eea83a85e code review, rebased to master, debug built, and did some manual testing with various config options on signet

Tree-SHA512: 37d68b449dd6d2715843fc84d85f48fa2508be40ea105a7f4a28443b318d0b6bd39e3b2ca2a6186f2913836adf08d91038a8b142928e1282130f39ac81aa741b

test/functional/feature_proxy.py

@@ -280,7 +280,7 @@ class ProxyTest(BitcoinTestFramework):
             n3 = networks_dict(self.nodes[3].getnetworkinfo())
             assert_equal(NETWORKS, n3.keys())
             for net in NETWORKS:
-                if net == NET_I2P:
+                if net == NET_I2P or net == NET_ONION:
                     expected_proxy = ''
                 else:
                     expected_proxy = f'[{self.conf3.addr[0]}]:{self.conf3.addr[1]}'